LSU C4G provides access to the Automatic Precise Positioning Service (APPS) to help GPS users estimate the position of their GPS antennae. IT is provided on a “as is” basis. APPS accepts GPS measurement files, and applies the most advanced GPS positioning technology in cooperation with NASA's Jet Propulsion Laboratory to estimate the position of static GPS receivers.

The resultant position, vector components and statistics are computed without any knowledge by the LSU C4G regarding the equipment or field operating procedures used. Thus, the veracity of any results is the sole responsibility of the person using the APPS service. By using the APPS, users accept full responsibility for its use and agree to hold LSU and its employees harmless for any problems encountered.

Welcome to APPS! The Automatic Precise Positioning Service of the Global Differential GPS (GDGPS) System.   APPS accepts GPS measurement files, and applies the most advanced GPS positioning technology from NASA's Jet Propulsion Laboratory to estimate the position of your GPS receivers, whether they are static, in motion, on the ground, or in the air. APPS employs:     Real-time GPS orbit and clock products from JPL's GDGPS System JPL's daily and weekly precise GPS orbit and clock products JPL's GIPSY-OASIS software for processing the GPS measurements     APPS continues to provide JPL's venerable AutoGIPSY (AG) service - for free, for static post-processing (e.g. measurement latency of a week or more), but also offers new and unique services: APPS will generate a time series of positions if your receiver was in motion APPS has access to real-time GPS orbit and clock products so you never have to wait APPS is fast. Positioning is available in seconds     Fly-Land-Send - APPS will estimate your flight trajectory within minutes after submission.     APPS supports a diverse customer base, from occasional users to heavy-duty industrial users. Occasional users may upload their measurement files manually through this web site. Heavy-duty users will receive Secure FTP access to our servers, to which they can upload their measurement files, and more easily automate their processing. It is also possible to interface with APPS through e-Mail.     APPS supports input in RINEX 2, RINEX 2.11, RINEX 3 input files, GIPSY TDP files     Give APPS a try... Instant Positioning